Oracle Database Discussions

Have you read https://www.jobinesh.com/2010/04/invoking-applicationmodule-from-servlet.html?m=1
This blog sites what to do to access an am from a servlet.

Timo

since the conversion no AM is available.
What happens when AM is accessed?

@dvohra21 the binding is not found, so no AM.

Did Timo's reference to getting a binding context help?

BindingContext bindingContext=null;
try {
    bindingContext = BindingContext.getCurrent();
    DCBindingContainer dcBindingContainer =
    bindingContext.findBindingContainer("view_dummyPageDef");
    JUCtrlRangeBinding depts =
    (JUCtrlRangeBinding)dcBindingContainer.findCtrlBinding("DepartmentsView1");
    dcBindingContainer.refreshControl();
    // Business logic goes here...
 }finally {
   // Clean up goes here...
}

Hi @dvohra21 and @timo-hahn1 ,
Thx for your info.
This works for 1 operation of my authentication servlet, getting the user info.
Another operation I have is setting the language, which I get from the SSO application, in the AM, so this can be used to fetch the correct data throughout all the views. This means I need the same instance of the AM to get this working and so creating an new instance of the AM with Configuration.createRootApplicationModule, will not help me.
A second problem is that my servlet does not have a seperate url, it is the same url as the pages, as it verifies for each request that the user is valid. If I want to implement the solution of adding manually a pagedef file, to which url should I then bind this pagedef file? The same challenge exist for setting this language in the FacesContext environment.
Thank you in advance.
Filip

@dvohra21
BindingContext.getCurrent() returns null in my filter.

FYI

Have you read the blog and configured the ADFBindingFilter to ADFServletFilter for the servlet?
Only then can you get the binding context.

Timo

Only a code snippet was posted but other config is also needed.

web.xml.txt (10.49 KB)I uploaded my web.xml file, I removed the init-params and context-params specific for my application.
I just also added the adfauthentication filter to the mappings of the adfbinding filter, without succes. Still no access to FacesContext.getCurrentInstance().
Am I still missing something?
How do you " configured the ADFBindingFilter to ADFServletFilter for the servlet"?
Small remark: My code is in a filter, not a servlet.

Thx

Hi everyone,
Some things I tried:
Oracle Support Doc 2423831.1 : adfc variable is empty/null in my case

adfc = ADFContext.initADFContext(httpRequest.getServletContext(), httpRequest.getSession() , httpRequest, servletResponse);

Amis Document : bcx variable in the ConfigurePageDef method, remains null

BindingContext bc = DCUtil.getBindingContext(httpRequest);

BindingContext method remains null

BindingContext bc2 = BindingContext.getCurrent();

All these calls are done in the doFilter method of my AuthenticationFilter class, as defined in the web.xml.

Thx for your help on this.

Filip,
you can look at
https://github.com/oracle/adf-samples where you find a sample 'Custom Servlet Filter to Register a Globally-Available Data Control.' This sample from way back implements your use case. I'm not sure it still runs as it uses struts as view technology, but the filter implementation should still work.
If this doesn't help, you can provide a complete test case that we can use to reproduce the problem. Just looking at some files and code snippets won't help.
Timo

Hi [Timo Hahn](/ords/forums/user/Timo Hahn) & dvohra21 ,
sorry for the delay, but due to holidays I had to postpone my search.
Attached an example. No additional actions are required to run this example.
DemoAuthFilterWithContext.zip (349.21 KB)I got the bindingContext working, through the correct web.xml configuration:
I used to use URI Path, but the Servlet config is working better.
The only thing I'm still missing is access to the FacesContext.
I added the call in my CustomAuthenticationFilter.java class at line 55. Running the app will result in a NPE.
Is there a way to get this FacesContext instance? I use it to set the local on the ViewRoot:

FacesContext.getCurrentInstance().getViewRoot().setLocale(Locale.FRENCH);

All help is more than welcome.

Thx

The issue could be :
My code is in a filter, not a servlet.
Shouldn't the code be in a servlet?

Hi @dvohra21 ,
indeed, good question. Because it was like that in 11g.
I created a new version of my demo app, with the same code in a servlet.
DemoAuthFilterWithContext.zip (455.8 KB)This results in the same problem. FacesContext is not accessible.
Thank you for your help on this.
Filip

How is the CustomServletFilter class a servlet? It doesn't extend the javax.servlet.http.HttpServlet.
Please refer to https://blogs.oracle.com/groundside/post/integrating-adf-and-servlets

Hi @dvohra21 ,
thanks for the example. But unfortunately this is not my usecase.
The code in my AuthenticationFilter is to add security checks and settings before a page is being called.
We are using an SSO-solution in front of our ADF Application.
In the case of the servlet, it can not stop the call to a page, nor can it set security settings in the session context before the execution of a page or taskflow.
Therefore I believe the use of a servlet is not a solution for my situation. Do you agree?

Thx

Thanks for the update, even though the earlier message is "I created a new version of my demo app, with the same code in a servlet."

@dvohra21 yes, in the hope this could also work, but it seems that for my use case I need a filter.
Is this assumption correct?
If so, what can I do to make it work?
Thx

A servlet is needed. "The FacesServlet servlet manages the request processing lifecycle in JSF applications. FacesServlet creates an object called FacesContext, which contains the information necessary for request processing"
https://docs.oracle.com/cd/E16340_01/web.1111/b31974/adf_lifecycle.htm

Hi @dvohra21 ,
ok, but how can I couple my servlet to this FacesServlet and make sure mine is executed after the FacesServlet one?
We can not put 2 servlets on the same URI path.
Thx
Filip

@filip-huysmans I'm somewhat confused by the long discussion. Can you summarize the current state, please?
I understood that you had two problems.
Can you access the application module from your filter?
Can you set the language inside the filter?

Timo

Hi @timo-hahn1 ,
I am able to access the AM from within the filter.
Now I still want to access the FacesContext from inside this filter, to set the language.
Accessing the FacesContext still fails.

Thx

Do you have access to the DCDataControl?
In this case, you can call setLocaleContext() on the DCDataControl the rest should be handled for you. This internally will call the setLocaleContext() on the ADF BC Session object and the application module.

Timo

Hi [Timo Hahn](/ords/forums/user/Timo Hahn) ,
I am not accessing the MC, but the FacesContext:

FacesContext.getCurrentInstance().getViewRoot().setLocale(Locale.FRENCH);

I suppose this is not the same thing as the ADF BC Session object or am I wrong?

The access to the viewRoot will not work as it is not present inside the filter.
I would set the locale directly to the DcDataControl. This will set it to the application module, and this should allow you to get the correct data inside the application module.

Timo

Hi @timo-hahn1 & @dvohra21 ,
I stop this thread, since we can not find a solution to my request:
Access the application module and FacesContext from a filter
This works without any issue with jspx, but once the facelets are enabled, this fails.
No idea why there is a difference between those 2 approaches at the level of the filters.

Thx a lot for you help.

Filip

Which two servlets? The downloadable sample zip does not include any servlet.